WO1991006104A1 - Appareil de manipulation d'agencements de capsules sources - Google Patents

Appareil de manipulation d'agencements de capsules sources Download PDF

Info

Publication number
WO1991006104A1
WO1991006104A1 PCT/CA1990/000171 CA9000171W WO9106104A1 WO 1991006104 A1 WO1991006104 A1 WO 1991006104A1 CA 9000171 W CA9000171 W CA 9000171W WO 9106104 A1 WO9106104 A1 WO 9106104A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
guide
source assembly
ports
channel means
Prior art date
Application number
PCT/CA1990/000171
Other languages
English (en)
Inventor
Glen Arthur Brown
Original Assignee
Glen Arthur Brown
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/423,231 external-priority patent/US4943731A/en
Application filed by Glen Arthur Brown filed Critical Glen Arthur Brown
Publication of WO1991006104A1 publication Critical patent/WO1991006104A1/fr

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F5/00—Transportable or portable shielded containers
    • G21F5/02—Transportable or portable shielded containers with provision for restricted exposure of a radiation source within the container

Definitions

  • This invention relates to an apparatus for handling radioactive source assemblies for radiological cameras and more particularly for inserting such assem ⁇ blies into a camera or other container.
  • an apparatus for inserting an elongate, flexible radiography source assembly into a radiological camera comprising: an insertion tube having an inlet end and an outlet end; first coupling means for coupling the outlet end of the insertion tube to the camera for transferring the source assembly from the tube to the camera; source inserter means including first and second ports, means for receiving the source and means for aligning the source with the first and second ports; cable means including a flexible drive cable and means for advancing and retracting the cable; second coupling means connecting one of the ports of the inserter means to the inlet end of the inser ⁇ tion tube and connecting the other of the ports of the insertion means to the cable means for receiving the flex ⁇ ible drive cable therefrom whereby the source assembly may be placed in the inserter means, aligned with the first and second ports and driven from the inserter means through the insertion tube into the camera by the flexible drive cable of the cable means.
  • the apparatus enables the operator to transfer the assembly to the camera without approaching the unshielded source closer than required for placing the assembly in the insertion means when using regulation length radiography tongs.
  • an apparatus for inserting an elongate, flexible radiography source assembly into a tube comprising: first channel means, opening upwardly for receiving the source assembly therealong; first and second guide means on opposite sides of the first channel means and converging downwardly to opposite sides of the first channel means for guiding the source assembly into the first channel means when it is placed between the first and second guide means; second channel means moveable relative to the first channel means between an open position spaced from the first channel means for allowing the source assembly to enter the first channel means and a closed position overlying the first channel means and cooperating there ⁇ with to define a conduit in which the source assembly is slideable; and coupling means for coupling one end of the tube to the apparatus for receiving the source assembly from the conduit.
  • the assembly may be picked up using tongs and dropped into the top funnel-shaped opening of the insert ⁇ er. Then, still using the tongs or other simple controls, the apparatus is closed. The assembly is then longitudi ⁇ nally aligned in the conduit such that a cable may pass along the tube propelling the assembly into the tube and thence to the camera or other container.
  • the apparatus is preferably equipped with a re ⁇ trictor engageable with a locking ball on the source assembly so that if the source assembly is not facing the right way around for entry into the camera, the source assembly will not move from the apparatus until the routing of the cable is changed such that the cable enters the invention at the opposite end.
  • the apparatus prefer ⁇ ably includes a re-routing unit for this purpose.
  • Figure 1 is a side view, partially in cross-sec ⁇ tion of a typical radiography source assembly
  • Figure 2 is a pictorial representation showing a camera, an insertion apparatus and a re-routing mechan ⁇ ism, with a source assembly about to be placed into the insertion apparatus from a set of tongs;
  • Figure 3 is a cross-sectional view of the inser ⁇ tion apparatus in the open position ready to receive a source assembly.
  • Figure 4 is a view like Figure 3 but showing the apparatus in partially closed condition
  • Figure 5 is a view like Figures 3 and 4 but showing the apparatus in the closed position;
  • Figure 6 is a plan view of the apparatus showing a restrictor;
  • Figure 7 is a side elevation of top and bottom channel parts of the insertion apparatus including the restrictor
  • Figure 8 is a bottom view of the top channel, including the restrictor:
  • Figure 9 is an isometric view of the re-routing mechanism
  • Figure 9A is a detail of Figure 9
  • Figure 10 is a view along line X-X of Figure 9;
  • Figure 11 is a schematic view of the entire appara * . as;
  • Figure 12 is an isometric view of an alternative embodiment of the insertion apparatus.
  • the source assembly includes a capsule 12 housing the radioactive source 14.
  • the capsule is connected to one end of a pig tail cable 16, which is in turn connected at the other end to a female connector 18.
  • the female connector may be con ⁇ nected to a male connector at the end of a drive cable when the assembly is in the camera for manipulation of the source assembly.
  • the pig tail cable 16 carries a locking ball 20 which is used in conjunction with a locking device in the camera for locking the source assembly in a re ⁇ tracted position.
  • This radioactive source assembly is conventional in its construction.
  • FIG. 2 of the drawings there is illustrated an apparatus for inserting a source such as that illustrated in Figure 1 in a radiological camera 22.
  • the apparatus includes an inserter apparatus 24 and a routing apparatus 26 joined by tubes 28 and 30 for inserting the source assembly 10 into an insertion tube 32 using a drive cable running in a cable tube 34 connected to the routing apparatus 26.
  • the source assembly 10 is placed into the open top 38 of the insertion apparatus 24 using regulation radiography tongs 36.
  • the inserter is subsequently manipulated to align the assembly 10 with the ends of the tubes 28 and 30 and the cable is driven through the inserter to drive the assembly along the insertion tube to the camera.
  • the construction of the inserter 24 is illus ⁇ trated in Figures 2 through 9.
  • the apparatus has a base 42 supporting the apparatus.
  • a vertical plate 44 extends upwardly from the base and has a semi cylindrical channel 46 formed along its upper edge.
  • a second plate 48 stands on the base 42, parallel to the plate 44.
  • the plate 48 has a beveled upper surface 50 that engages a pivoting guide plate 52 to limit its movement about a pivot 54 lo ⁇ cated between and parallel to the plates 44 and 48.
  • a second guide plate 56 is vertically oriented and located on an opposite side of the plate 44 from the plate 52.
  • the two guide plates are mounted in a rectan ⁇ gular housing 58.
  • Two aligned circular ports 60 and 62 are formed in the respective end walls 61 and 63 of the housing.
  • the ports are located vertically above the semi cylindrical channel 46 in the top of plate 44.
  • a bar 64 extends from end to end of the housing, along the vertical guide plate 56.
  • a semi cylindrical, downwardly opening channel 66 is formed in its bottom sur ⁇ face. The channel 66 aligns with the upper edges of the ports 60 and 62.
  • the inserter In use of the inserter, it is initially arranged with the components in a receiving position as illustrated in Figure 3.
  • the housing 58 is raised off the base 42 and the guide plate 52 is pivoted away from the guide plate 56 so that the two converge towards the channel 46.
  • the guide plate 52 is supported on the beveled surface 50 of the plate 48.
  • a source assembly 10 dropped into the top of the housing 58 will then be directed by the sloping guide plate 52 into the channel 46.
  • the plate 52 is then brought to a vertical position by pivoting about the pivot 54 towards the guide plate 56.
  • Plate 52 reaches a verti ⁇ cal orientation illustrated in Figure 4, confining the source assembly 10 between the guide plates in the channel 46.
  • the housing is then lowered on the plates 44 and 48, towards the base, thus bringing the bar 64 onto the top of the plate 44 so that the channels 46 and 66 cooperate to define a cylindrical conduit confining the source assembly in alignment with the ports 60 and 62 in the end walls of the housing.
  • the guide plate 52 slides into the space between plates 44 and 48 as the housing is lowered.
  • the plate 48 supports guide plate 52 and acts to prevent movement of the housing and the upper channel to the closed condition.
  • the inserter is equipped with a restrictor 68 that engages the locking ball 20 on the source assembly to limit its movement out of the inserter to one direction only, that is with the female connector
  • the restrictor 68 includes an S- ⁇ haped spring
  • an inverted U-shaped restrictor block 74 is fitted onto the bar with its legs 76 extending along vertical grooves 78 in the sides of the bar.
  • the block is connected to the spring 70 by a cap screw 80 that is threaded into the block 74 and bears on the top of the bar 64. Threading the cap screw through the block raises the block against the action of the spring 70 to an inactive position.
  • the legs 76 of the block project into the channel 66 in the bar 64. They also extend into grooves 81 in the plate 52 to project into the sides of channel 46.
  • the legs have chamfers 82 along their vertical edges and cooperate to restrict the conduit formed by the two channels 46 and 66 at a throat
  • the routing apparatus 26 serves to couple the port 60 of the inserter to either the camera or the cable drive while coupling the port 62 of the inserter to the other of the camera and the cable drive. This allows the cable to drive the source assembly from the inserter into the camera, regardless of which way around it has been placed in the inserter.
  • the construction of the router 26 and 9A. is most clearly illustrated in Figures9/ It includes a disk-like rotor 86 with two ports 88 and 90 spaced from the centre of the rotor on a common diameter.
  • a second disk-like rotor 91 isin face to face engagement with the rotor 86 and has two ports 92 and 94 aligned with the ports 88 and 90. The rotors are held together with a pin
  • a latch 104 is mounted on the rotor 86 and includes a U-shaped bracket 106 secured to the outer face of the rotor 86.
  • a pin 108 extends through the end of the bracket with its head 110 on the outside.
  • the pin carries a washer 112 retained by a cotter
  • a coil spring 114 is captured between the base of the bracket 106 and the washer 112 to bias the pin towards the rotor 86 on which it is mounted. Under this bias, the pin extends into a locking aperture ll5 in the rotor 86, and an aligned one of two locking apertures 116 in the rotor 91.
  • the two rotors can be rotated 180 ⁇ with respect to one another and then latched in place so that the alignment of the ports is reversed.
  • the effect of this is illustrated most clearly in the schematic draw ⁇ ing of Figure 11.
  • the source assembly 10 is illustrated as being housed within the inserter 24 in alignment with the ports 60 and 62.
  • the router 26 is arranged such that the port 60 is connected through the tube 28 to the insertion tube 32, which leads to the camera.
  • the port 62 is connected by the tube 30 to the router 26, which is coupled to the cable drive tube 32. This is in turn connected to the cable drive unit 117 which is conventionally used with cameras of the type in question.
  • the locking ball 20 will be between the restrictor 68 and the port 62. This means that any attempt to drive the source assembly out of the inserter using the cable drive will simply drive the source assembly forwards until the locking ball engages the restrictor, thus preventing the source assembly from being inserted into the camera back ⁇ wards.
  • the router 26 is released by pulling on the latch pin 108, rotating the two rotors 180 ⁇ with respect to one another so that the tube 28 then con ⁇ nects the port 60 to the cable drive, while the tube 30 connects the port 62 to the insertion tube. Actuation of the cable drive then will drive the source assembly out of the inserter into the insertion tube in the correct orientation without manipulation of the source assembly by the operator.
  • That insert ⁇ er includes two end plates 120.
  • An upwardly open channel 122 extends between the end plates in alignment with ports 124 and 126 in the respective end plates.
  • the end plates are also joined by a pair of spacer rods 128 and a fixed, vertical guide plate 130 that extends along one side of the channel 122.
  • a second guide plate 132 extends between the end plates and is pivotally mounted on them by means of pivots 134, only one of which has been illustrated.
  • a latch 136 is connected to the guide plate 132 by a lug 138 and a pin 140.
  • the latch is a bar, notched at one end to engage one of the rods 128 to hold the guide plate 132 in place when it is in the retaining position.
  • the upper channel 142 is in this case mounted on a vertical rod 144 that runs through a block 146 carried on a bracket 148.
  • the channel 142 carries a restrictor 150 with legs 152 that extend into the channels 142 and 122 ensure unidirectional passage of the source assembly from the apparatus.
  • the guide plate 132 and the rod 144 must be manipulated separately by the operator using tongs as a manipulator.
  • the source assembly is retained in a conduit defined by the two channels meeting face to face.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Radiation-Therapy Devices (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

Des agencements de sources radiographiques allongés et flexibles sont introduits dans des appareils photographiques de radiologie au moyen d'un appareil d'introduction, dans lequel on laisse descendre l'agencement source et qui assure l'alignement de l'agencement source sur deux orifices reliés à une paire de tubes. Les tubes sont reliés par l'intermédiaire d'un appareil d'acheminement à l'appareil photographique et à un entraînement par câbles, de sorte que l'agencement source peut être entraîné à se déplacer de l'appareil d'introduction jusque dans l'appareil photographique suivant une orientation correcte.
PCT/CA1990/000171 1989-10-18 1990-05-30 Appareil de manipulation d'agencements de capsules sources WO1991006104A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US423,231 1989-10-18
US07/423,231 US4943731A (en) 1988-10-19 1989-10-18 Apparatus for handling source capsule assemblies

Publications (1)

Publication Number Publication Date
WO1991006104A1 true WO1991006104A1 (fr) 1991-05-02

Family

ID=23678118

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1990/000171 WO1991006104A1 (fr) 1989-10-18 1990-05-30 Appareil de manipulation d'agencements de capsules sources

Country Status (5)

Country Link
JP (1) JPH04504619A (fr)
CA (1) CA2017094A1 (fr)
DE (1) DE4091811T (fr)
GB (1) GB2250409B (fr)
WO (1) WO1991006104A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848137A (en) * 1973-04-09 1974-11-12 Sidney Geoffrey Young Handling of radio-active sources
FR2348715A1 (fr) * 1976-04-20 1977-11-18 Cgr Mev Porte-sources destine a recevoir des sources radioactives et applicateur y associe utilises en radiotherapie
FR2348714A1 (fr) * 1976-04-20 1977-11-18 Cgr Mev Appareil de curietherapie
EP0012004A1 (fr) * 1978-11-27 1980-06-11 Tech/Ops, Inc. Dispositif pour le transfert d'une quantité de matériau radioactif entre une position de stockage et une position d'utilisation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848137A (en) * 1973-04-09 1974-11-12 Sidney Geoffrey Young Handling of radio-active sources
FR2348715A1 (fr) * 1976-04-20 1977-11-18 Cgr Mev Porte-sources destine a recevoir des sources radioactives et applicateur y associe utilises en radiotherapie
FR2348714A1 (fr) * 1976-04-20 1977-11-18 Cgr Mev Appareil de curietherapie
EP0012004A1 (fr) * 1978-11-27 1980-06-11 Tech/Ops, Inc. Dispositif pour le transfert d'une quantité de matériau radioactif entre une position de stockage et une position d'utilisation

Also Published As

Publication number Publication date
DE4091811T (fr) 1991-10-10
GB9113119D0 (en) 1991-08-07
GB2250409A (en) 1992-06-03
JPH04504619A (ja) 1992-08-13
GB2250409B (en) 1994-01-05
CA2017094A1 (fr) 1991-04-18

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